What is the U.S. IRS address to mail a return?

[JohnB5677]

Your Federal tax return goes to a different location depending on the state that you live in.  

See this list to determine the location for you.

Where to File Paper Tax Returns (irs.gov)

[DoninGA]

Go to this IRS website for the address of a mailed federal tax return, by state, with or without a tax payment - https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment

If your mailing address is outside the US, then click on the link on the IRS website given that states - International - Where to file addresses for taxpayers and tax professionals